MixedCollection items

Any chance the items property could be promoted as a public property for MixedCollection? I've seen it used quite a lot in example code on the forums, but I'm always nervy about using stuff that's not promoted as a public element in the API (have seen some go the way of the dinosaur before).

*I'd put in a feature request in the feature request forum, but it looks like my support is lapsed and our procurement is dragging their feet on renewing me.

Oh, sorry. Actually, both. It looks like both set up me.items = [] in the AbstractMixedCollection constructor.
Would be helpful to have that items array accessible as a public property in both ST and ExtJS both.